CVE-2026-98185: Linux kernel · wifi: mwifiex: validate scan response extents
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:27 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: validate scan response extents mwifiex_ret_802_11_scan() subtracts the fixed response fields and the firmware-provided BSS length from resp->size without first proving that either extent fits. A short response or oversized BSS length can therefore underflow tlv_buf_size and make the TLV parser walk beyond the command response. Compute the fixed extent from the selected normal or background scan response. Validate that the fixed fields and BSS data fit before deriving the TLV extent and entering the parser.
References
- ubuntu.com/security/CVE-2026-98185 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98185 (opens in a new tab)
- git.kernel.org/linus/3687d7d48070838cc2953431b3a27717cab0aaf6 (opens in a new tab)
- git.kernel.org/stable/c/25217c5f6ce0bf3004f80c129464cd35fe9a420f (opens in a new tab)
- git.kernel.org/stable/c/3687d7d48070838cc2953431b3a27717cab0aaf6 (opens in a new tab)
- git.kernel.org/stable/c/48312f0085aa1577d6d41af2a079b34de17c1a57 (opens in a new tab)
- git.kernel.org/stable/c/7106ad8b74f50cca1ef36131f327d2c78f556daa (opens in a new tab)
- git.kernel.org/stable/c/9cff2f39ed38a32070b08364c4c9346e85b8f9ec (opens in a new tab)
- git.kernel.org/stable/c/c4943323fda22ef27bb6479b9d328ae48c63f64c (opens in a new tab)
- git.kernel.org/stable/c/cb0008480ed7d5cf76f3ad9668a91bbb7d0b4417 (opens in a new tab)
- git.kernel.org/stable/c/dccf5ecaad4d8d43c545921f20328e8f91af8698 (opens in a new tab)